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Article Title: The Dark Side of Ice Dam Formations
Author: Dariusz Rudnicki
Category: Home
Word Count: 487
Keywords: ice dams, ice damming, attic ventilation, roof ventilation
Author's Email Address: [email protected]
Article Source: http://www.articlemarketer.com
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Ice dam formations along the edges of your home roof and icicles hanging from 
the gutters and / or soffits should never be ignored. Their beauty on the 
exterior has roots penetrating your house attic and wall structures, often 
causing significant damage.

There are three main things responsible for creating ice dams:

1. Inadequate / improper house attic insulation

2. Inadequate house attic ventilation

3. Heat sources in attic area

Any areas between the attic and living space that are missing or have a low 
amount of insulation permit unwanted heat to transfer from the house into the 
unheated attic.

Warmer air elevates the roof deck temperature directly above the "leak" and 
causes snow to melt onto the roof surface. Water running down the roof towards 
the area along the gutters / over the soffits starts re-freezing (soffits and 
gutters are colder than the rest of the roof surface because they hang over the 
house edge), creating an ice dam.

Water from melting snow and ice forms icicles; some of the water below and 
above the ice dam will find its way back under the shingle surfaces. If your 
roof has no ice & water shield installed (older roofs rarely have that), the 
roof deck becomes soaked with water and eventually mold starts growing on its 
surface. In some roof / house structure designs, water from the ice dams might 
start dripping into the wall cavity located directly underneath it.

If you have any heat sources in the house attic like improperly installed 
bathroom vents, heating ducts, gaps around the attic floor penetrations, etc., 
you are dramatically increasing your chances for ice dam formations.

Properly designed attic ventilation, including plenty of soffit / drip edge 
vents and roof top vents, may be able to remove the excess of heat and prevent 
ice dams from appearing on your roof. However, by leaving leaks as they are, 
you are wasting expensive energy.

Observe your roof after the snowfall. If you notice snow disappearing from the 
roof surface in certain areas - check the attic. The main problem should be 
directly below that spot where the snow has already melted. It may take only a 
little effort to find it, but be extremely careful when evaluating the attic - 
don't do it if you are not 100% comfortable with it!

It doesn't take much snow on the roof to create serious conditions in the attic 
and ice dams on the exterior. If you chose to ignore it, though, it might 
require a lot of effort and money to fix it.

Roof and gutter heating cables - they help to eliminate ice dams, and might be 
your only solution for some types of roofs. However, if your house has an 
accessible attic, and poor attic ventilation is responsible for ice dams - 
correct the problem. It might not be cheaper, but it will also help to keep 
your house cooler during the summer.

Check your attic periodically, especially during the cold and rainy season.

Dariusz Rudnicki is a licensed Illinois home inspector who has been in this 
business for over ten years. Are you preparing your house for sale or looking 
for an advice on any type of problems with your house? All you need to do is 
visit http://www.checkthishouse.com and ask him for help.
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